<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>
<body>
    <div id="app">
        <div :style="[baseStyle,moreStyle]">Hello,Vue.js</div>
    </div>
</body>
<script>
    const vm=new Vue({
        el:'#app',
        data:{
            baseStyle:{
                border:'2px solid black'
            },
            moreStyle:{
                width:'100px',
                height:'100px'
            }
        }
    })
</script>
</html>